描述 Description

The uP9614 is a high-efficiency, single synchronous buckconverter with an internal power switch. With internal lowRDS(ON) switches, the high-efficiency buck converter iscapable of delivering up to 7A output current for chargerinterface. The proprietary RCOTTM technology provides fasttransient response and high noise immunity. When thereis a ripple injection circuit, it can support ceramic andOSCON output capacitors for low ESR application. Thiscombination is ideal for building modern low duty ratio,untra-fast load step response DC-DC converters. The outputvoltage ranges from 2.9V to12V, and the conversion inputvoltage ranges is from 10.8V to 30V. The quasi-constantswitching frequency is 100kHz. RCOTTM control tracks the100kHz switching frequency over a wide range of input andoutput voltages, while it increases the switching frequencyat step-up of load.

The strong gate drivers of the uP9614 allow low RDS(ON)FETs for high current applications. It is available in a spacesaving WQFN4x4-32L package.

特性 Features

? Input Voltage Absolute Maximum Rating: 32V
? Wide Input Voltage Range: 10.8V to 30V
? Input Over Voltage Protection: 32V (typ.)
? Output Voltage Range: 2.9V to 12V
? Wide Output Load Range: 0A to 7A
? Built-In 1% 1V Reference
? RCOTTM (Robust Constant On-Time) Control Architecture
? Quasi-Constant Switching Frequency Operation: 100kHz
? 1ms, 2ms, 4ms and 8ms Selectable Output Voltage Soft-Start
? Pre-charged Start-up Capability
? Built-in Output Discharge
? Built-in VIN OVP/VOUT OVP/Output UVP/OCP/OTP
? WQFN4x4-32L Package
? RoHS Compliant and Halogen Free

應(yīng)用 Application

? Portable Charging Devices
? Point-of-Load Systems
? Notebook Computers
? I/O Supplies
? System Power Supplies